Clamd not configured properly

I have just installed Clamd from WHM but when I try to upload any file from Cpanel's file manager I get an error message "Virus Detected; File not Uploaded! (Clamd is not configured properly.)". I am sure that the file i am uploading contains no viruses. Can anyone indicate how can I configure clamd to do this properly?

A final question regarding clamd with cpanel. Does it only scan the files that are uploaded via the file manager and email or does it scan all files frequently? If not, can I configure it to do that?